Calculate the area of a regular: 1) triangle 2) quadrilateral 3) pentagon 4) hexagon 5) dodecagon with side equal to a
| June 21, 2021 | education
The area of a regular triangle is: S3 = a ^ 2 * √3 / 4 cm2.
The area of a regular quadrangle is: S4 = a ^ 2 cm2.
The area of a regular pentagon is: S5 = a ^ 2 * (√25 + 10 * √5) / 4 cm2.
The area of a regular hexagon is: S6 = a ^ 2 * 3 * √3 / 2 cm2.
The area of a regular dodecagon is: S12 = a ^ 2 * 3 * (2 + √3) cm2.
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